05540160 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°49'54", long 88°02'51" (NAD of 1927), in SE1/4SW1/4 sec.25, T.39 N., R.10 E., Du Page County, Hydrologic Unit 07120004, on upstream side of bridge on State Highway 56, 2.2 mi northwest of Downers Grove, and at mile 15.0.

DRAINAGE AREA.-- 26.6 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1989 to current year.
	STAGE: Water years 1994-2002.
	PARTIAL RECORD: Annual maximum, water years 1961-76.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 660.00 ft above NGVD of 1929. Prior to July 19, 1989, at datum 12.21 ft higher.

REMARKS.-- Diurnal fluctuation at low flow caused by sewage-treatment plants upstream from station.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,720 ft³/s, Aug. 26, 1972, gage height, 16.94 ft; minimum discharge, 3.6 ft³/s, Dec. 19, 1989.

REMARKS FOR CURRENT YEAR.-- Records good.

DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	33	39	50	25	40	34	51	46	29	24	22	23
2	30	36	42	25	36	43	59	51	28	23	23	53
3	28	33	37	24	34	49	49	45	30	22	20	36
4	47	30	35	25	31	44	42	40	241	22	28	28
5	167	29	32	25	27	38	38	36	339	22	54	25

6	88	28	30	25	27	49	35	38	175	21	32	24
7	52	28	28	24	29	68	54	34	94	22	25	25
8	41	28	26	24	33	165	131	33	62	23	22	23
9	39	32	26	24	47	327	253	50	48	244	21	22
10	38	29	25	24	79	245	155	38	59	153	20	23

11	42	26	23	24	72	135	92	139	95	77	20	22
12	81	25	31	24	60	91	66	450	59	47	21	21
13	368	25	62	24	51	71	55	347	48	36	72	21
14	961	33	53	24	47	61	54	160	80	32	127	20
15	634	30	45	24	48	55	47	89	62	29	78	20

16	259	27	44	24	41	50	42	138	44	26	49	20
17	127	28	51	24	37	46	44	177	39	25	34	23
18	84	28	44	23	35	43	38	104	34	24	29	32
19	64	34	46	24	56	42	38	74	31	22	33	28
20	51	28	45	23	114	38	74	61	29	22	27	41

21	46	27	41	23	108	35	67	51	27	20	24	37
22	43	25	43	24	79	34	59	45	26	21	282	38
23	194	24	45	26	64	32	47	43	29	21	297	30
24	248	36	40	26	54	30	58	42	28	21	147	25
25	232	55	35	26	47	30	64	45	55	20	71	22

26	131	41	33	25	42	30	47	44	40	21	48	21
27	78	36	32	25	40	29	66	40	30	29	38	20
28	60	33	30	25	37	28	104	37	26	25	34	18
29	52	38	29	25	---	61	69	34	25	30	30	22
30	45	59	28	25	---	69	56	32	24	27	26	22

31	43	---	27	33	---	54	---	29	---	24	24	---

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 2002, BY WATER YEAR (WY)
MEAN	43.29	48.12	37.63	47.61	56.54	57.21	73.89	67.72	57.98	38.38	40.58	36.22
MAX	142	92.8	56.2	100	138	87.8	139	121	97.2	96.5	63.4	83.3
(WY)	2002	1991	1991	1993	1997	1993	1993	1990	1993	1996	1998	2001
MIN	18.5	20.5	16.3	24.6	28.9	29.9	33.3	22.2	21.5	19.9	18.4	19.7
(WY)	1990	2000	1990	2000	1996	1996	1990	1992	1992	1991	1991	1995

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1990 - 2002
ANNUAL TOTAL	21556		21161
ANNUAL MEAN	59.06		57.98		50.34
HIGHEST ANNUAL MEAN					64.1	1993
LOWEST ANNUAL MEAN					38.5	1994
HIGHEST DAILY MEAN	961	Oct 14	961	Oct 14	961	Oct 14 2001
LOWEST DAILY MEAN	19	Jul 15	18	Sep 28	11	A
ANNUAL SEVEN-DAY MINIMUM	20	Jul 11	21	Jul 20	12	Aug 14 1992
MAXIMUM PEAK FLOW			1040	Oct 14	1040	Oct 14 2001
MAXIMUM PEAK STAGE			16.28	Oct 14	16.28	Oct 14 2001
INSTANTANEOUS LOW FLOW			13	B	3.6	Dec 19 1989
ANNUAL RUNOFF (CFSM)	2.22		2.18		1.89
ANNUAL RUNOFF (INCHES)	30.15		29.59		25.72
10 PERCENT EXCEEDS	103		99		94
50 PERCENT EXCEEDS	38		36		32
90 PERCENT EXCEEDS	24		23		19

	A - Aug. 19, Oct. 7, 1992.
	B - Dec. 11, Feb. 4, Sept. 28, 29.

DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	33	39	50	25	40	34	51	46	29	24	22	23
2	30	36	42	25	36	43	59	51	28	23	23	53
3	28	33	37	24	34	49	49	45	30	22	20	36
4	47	30	35	25	31	44	42	40	241	22	28	28
5	167	29	32	25	27	38	38	36	339	22	54	25

6	88	28	30	25	27	49	35	38	175	21	32	24
7	52	28	28	24	29	68	54	34	94	22	25	25
8	41	28	26	24	33	165	131	33	62	23	22	23
9	39	32	26	24	47	327	253	50	48	244	21	22
10	38	29	25	24	79	245	155	38	59	153	20	23

11	42	26	23	24	72	135	92	139	95	77	20	22
12	81	25	31	24	60	91	66	450	59	47	21	21
13	368	25	62	24	51	71	55	347	48	36	72	21
14	961	33	53	24	47	61	54	160	80	32	127	20
15	634	30	45	24	48	55	47	89	62	29	78	20

16	259	27	44	24	41	50	42	138	44	26	49	20
17	127	28	51	24	37	46	44	177	39	25	34	23
18	84	28	44	23	35	43	38	104	34	24	29	32
19	64	34	46	24	56	42	38	74	31	22	33	28
20	51	28	45	23	114	38	74	61	29	22	27	41

21	46	27	41	23	108	35	67	51	27	20	24	37
22	43	25	43	24	79	34	59	45	26	21	282	38
23	194	24	45	26	64	32	47	43	29	21	297	30
24	248	36	40	26	54	30	58	42	28	21	147	25
25	232	55	35	26	47	30	64	45	55	20	71	22

26	131	41	33	25	42	30	47	44	40	21	48	21
27	78	36	32	25	40	29	66	40	30	29	38	20
28	60	33	30	25	37	28	104	37	26	25	34	18
29	52	38	29	25	---	61	69	34	25	30	30	22
30	45	59	28	25	---	69	56	32	24	27	26	22

31	43	---	27	33	---	54	---	29	---	24	24	---

DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	33	39	50	25	40	34	51	46	29	24	22	23
2	30	36	42	25	36	43	59	51	28	23	23	53
3	28	33	37	24	34	49	49	45	30	22	20	36
4	47	30	35	25	31	44	42	40	241	22	28	28
5	167	29	32	25	27	38	38	36	339	22	54	25

6	88	28	30	25	27	49	35	38	175	21	32	24
7	52	28	28	24	29	68	54	34	94	22	25	25
8	41	28	26	24	33	165	131	33	62	23	22	23
9	39	32	26	24	47	327	253	50	48	244	21	22
10	38	29	25	24	79	245	155	38	59	153	20	23

11	42	26	23	24	72	135	92	139	95	77	20	22
12	81	25	31	24	60	91	66	450	59	47	21	21
13	368	25	62	24	51	71	55	347	48	36	72	21
14	961	33	53	24	47	61	54	160	80	32	127	20
15	634	30	45	24	48	55	47	89	62	29	78	20

16	259	27	44	24	41	50	42	138	44	26	49	20
17	127	28	51	24	37	46	44	177	39	25	34	23
18	84	28	44	23	35	43	38	104	34	24	29	32
19	64	34	46	24	56	42	38	74	31	22	33	28
20	51	28	45	23	114	38	74	61	29	22	27	41

21	46	27	41	23	108	35	67	51	27	20	24	37
22	43	25	43	24	79	34	59	45	26	21	282	38
23	194	24	45	26	64	32	47	43	29	21	297	30
24	248	36	40	26	54	30	58	42	28	21	147	25
25	232	55	35	26	47	30	64	45	55	20	71	22

26	131	41	33	25	42	30	47	44	40	21	48	21
27	78	36	32	25	40	29	66	40	30	29	38	20
28	60	33	30	25	37	28	104	37	26	25	34	18
29	52	38	29	25	---	61	69	34	25	30	30	22
30	45	59	28	25	---	69	56	32	24	27	26	22

31	43	---	27	33	---	54	---	29	---	24	24	---

DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	33	39	50	25	40	34	51	46	29	24	22	23
2	30	36	42	25	36	43	59	51	28	23	23	53
3	28	33	37	24	34	49	49	45	30	22	20	36
4	47	30	35	25	31	44	42	40	241	22	28	28
5	167	29	32	25	27	38	38	36	339	22	54	25

6	88	28	30	25	27	49	35	38	175	21	32	24
7	52	28	28	24	29	68	54	34	94	22	25	25
8	41	28	26	24	33	165	131	33	62	23	22	23
9	39	32	26	24	47	327	253	50	48	244	21	22
10	38	29	25	24	79	245	155	38	59	153	20	23

11	42	26	23	24	72	135	92	139	95	77	20	22
12	81	25	31	24	60	91	66	450	59	47	21	21
13	368	25	62	24	51	71	55	347	48	36	72	21
14	961	33	53	24	47	61	54	160	80	32	127	20
15	634	30	45	24	48	55	47	89	62	29	78	20

16	259	27	44	24	41	50	42	138	44	26	49	20
17	127	28	51	24	37	46	44	177	39	25	34	23
18	84	28	44	23	35	43	38	104	34	24	29	32
19	64	34	46	24	56	42	38	74	31	22	33	28
20	51	28	45	23	114	38	74	61	29	22	27	41

21	46	27	41	23	108	35	67	51	27	20	24	37
22	43	25	43	24	79	34	59	45	26	21	282	38
23	194	24	45	26	64	32	47	43	29	21	297	30
24	248	36	40	26	54	30	58	42	28	21	147	25
25	232	55	35	26	47	30	64	45	55	20	71	22

26	131	41	33	25	42	30	47	44	40	21	48	21
27	78	36	32	25	40	29	66	40	30	29	38	20
28	60	33	30	25	37	28	104	37	26	25	34	18
29	52	38	29	25	---	61	69	34	25	30	30	22
30	45	59	28	25	---	69	56	32	24	27	26	22

31	43	---	27	33	---	54	---	29	---	24	24	---